Question 1
A distillation column separates a feed containing 40 mol% ethanol and 60 mol% water into a distillate product containing 85 mol% ethanol and a bottoms product containing 5 mol% ethanol. If the feed rate is 1000 mol/h, what is the flow rate of the distillate product?
Correct Answer:
438 mol/h
Question 2
What is the primary purpose of performing a degree-of-freedom analysis before solving material balance problems?
Correct Answer:
To determine if the problem is properly specified and solvable
Question 3
100 kmol/h of methane is burned with 50% excess air in a furnace. Assuming complete combustion, what is the molar flow rate of unreacted (excess) O₂ in the flue gas?
Correct Answer:
100 kmol/h
Question 4
An evaporator concentrates a 10 wt% NaCl solution to 35 wt%. If the feed rate is 5000 kg/h, what is the rate of water evaporated?
Correct Answer:
3571 kg/h
Question 5
Fresh feed of 100 mol/h of pure A enters a reactor that achieves 60% single-pass conversion of A. The unreacted A is perfectly separated and 50% of it is recycled to the reactor inlet (the rest is purged). The overall conversion of A in the process is:
Correct Answer:
75%
Question 1
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Prepare with the PE Chemical Practice Questions - PE Chemical Engineering Exam practice quiz. This question bank includes 100 questions covering flow, rate, water, heat, and pipe. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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PE Chemical Practice Questions - PE Chemical Engineering Exam

This practice set contains 100 questions from the matching question bank and focuses on flow, rate, water, heat, and pipe. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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